In every legend, there is truth. In every truth, there is legend. Strange things are happening in Oaksend: The blood moon shines bright red in the sky, mysterious fog swirls over the river, fish disappear, and crabs flee to land. Is a river monster lurking in Malmuddy, as an old legend tells? For Robin and his guardian monster Melvin, an adventurous quest begins, leading them to Aquanades, river wolves, and a small island with a big secret. What curse hangs over the innocent Hamlins? And will Robin and Melvin be able to break the evil spell?.